Clock Synthesizers

A clock synthesizer is an electronic circuit that converts a single clock signal frequency into a range of output frequencies. Frequency values are given in MHz. Clock synthesizers can generate frequencies in multiples of the original, also known as a conversion rate. They can work in a phase-locked look, also known as a PLL.

Clock synthesizers are semiconductor devices which come in a standard package, such has a QFN, TSSOP or SOIC.

Where are Clock Synthesizersused used?

  • Wireless devices
  • RF devices
  • Radio
  • GPS
  • TV
  • Mobile phones

What is a PLL Synthesizer?

PLL synthesizers are analogue devices. A PLL circuit features a Voltage-Controlled Oscillator (VCO). The VCO output is constantly adjusted to match the phase and frequency of an input signal, using feedback from a Phase Comparator. A PLL circuit is often used to synchronise (lock) RF receiver circuits to an incoming carrier signal. If a frequency divider integer-n is introduced between the VCO output and the phase comparator, the PLL circuit output frequency will be fin/n, locked in phase to fin. If fin comes from a highly-stable fixed frequency oscillator and n is programmable, then the circuit forms the basis of an accurate Digital Frequency Synthesizer.

What is a Direct Digital Synthesizer?

Direct digital synthesizers (DDS) are digital devices. They are made up of a crystal oscillator, an NCO (numerically controlled oscillator) and a DAC (digital-to-analogue converter). DDS, in comparison to an analogue PLL synthesizer, offer improved phase noise and better control over the output where there are transitions between frequencies. They also offer better jitter performance.


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Description Price Category Conversion Rate Resolution Maximum Output Frequency Mounting Type Number of Elements per Chip Minimum Output Frequency Package Type Maximum Supply Current Pin Count Dimensions Maximum Input Frequency Height Length
New
RS Stock No. 216-6267
Mfr. Part No.9FG104EGILFT
SGD9.09
Each (In a Pack of 2)
units
- - - - - - - TSSOP 109 mA 28 - 400MHz - -
RS Stock No. 169-8384
Mfr. Part No.CS2000CP-CZZ
SGD10.82
Each (In a Tube of 96)
units
- - - 75MHz Surface Mount 1 6MHz MSOP 18 mA 10 3 x 3 x 0.95mm 30MHz 0.95mm 3mm
RS Stock No. 497-1760
Mfr. Part No.ADF4106BRUZ
SGD9.31
Each
units
- - - 325MHz Surface Mount 1 - CP 20 13 mA 16 5 x 4.4 x 1.05mm 6000MHz 1.05mm 5mm
RS Stock No. 817-5985
Mfr. Part No.CDCM61002RHBT
SGD10.76
Each
units
- - - 683.264MHz Surface Mount 2 43.75MHz VQFN 65 mA 32 5.15 x 5.15 x 0.95mm 28.47MHz 0.95mm 5.15mm
RS Stock No. 708-9782
Mfr. Part No.ADF4360-9BCPZ
SGD10.69
Each
units
- - - 400MHz Surface Mount 1 1.1MHz CP 24 2 5 mA 24 4 x 4 x 0.83mm 250MHz 0.83mm 4mm
RS Stock No. 160-3297
Mfr. Part No.HMC703LP4E
SGD39.49
Each (On a Reel of 50)
units
- - - - Surface Mount 1 - QFN 95 mA 24 4.1 x 4.1 x 0.95mm 8000MHz 0.95mm 4.1mm
RS Stock No. 161-2870
Mfr. Part No.Si5332A-C-GM1
SGD17.82
Each
units
- - - 312.5MHz Surface Mount 7 5MHz QFN 70 mA 32 5 x 5 x 0.85mm 50 MHz, 170 MHz, 250MHz 0.85mm 5mm
RS Stock No. 483-6724
Mfr. Part No.74HCT4046AD,112
BrandNexperia
SGD0.962
Each (In a Pack of 5)
units
- - - - Surface Mount 1 - SOIC 50 mA 16 10 x 4 x 1.45mm - 1.45mm 10mm
RS Stock No. 162-5220
Mfr. Part No.PLL1708DBQ
SGD7.342
Each (In a Tube of 50)
units
- - - - Surface Mount 2 - SSOP 25 mA 20 8.75 x 4 x 1.5mm 27.27MHz 1.5mm 8.75mm
RS Stock No. 862-6234
Mfr. Part No.HMC822LP6CE
SGD27.49
Each
units
- - - 3300MHz Surface Mount 1 2660MHz QFN 56 mA 40 6.1 x 6.1 x 0.9mm 1650MHz 0.9mm 6.1mm
RS Stock No. 161-2838
Mfr. Part No.Si52208-A01AGM
SGD4.699
Each (In a Tray of 490)
units
- - - 100MHz Surface Mount 4 - QFN 63 mA 48 6 x 6 x 0.85mm 25MHz 0.85mm 6mm
RS Stock No. 178-6978
Mfr. Part No.74HCT4046AD,112
BrandNexperia
SGD1.132
Each (In a Tube of 50)
units
- - - - Surface Mount 1 - SOIC 50 mA 16 10 x 4 x 1.45mm - 1.45mm 10mm
RS Stock No. 662-4589
Mfr. Part No.CD74HC4046AE
SGD0.931
Each (In a Pack of 10)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 620-2173
Mfr. Part No.CDCVF25084PW
SGD18.10
Each
units
- - - 180MHz Surface Mount 1 10MHz TSSOP - 16 5 x 4.4 x 1.15mm 45MHz 1.15mm 5mm
RS Stock No. 697-7561
Mfr. Part No.ADF4360-8BCPZ
SGD11.66
Each
units
Integrated Synthesizer - - - Surface Mount - - LFCSP - 24 4 x 4 x 0.83mm - 0.83mm 4mm
RS Stock No. 186-9936
Mfr. Part No.FS6377-01IG-XTD
SGD15.90
Each
units
- - - 150MHz Surface Mount 4 0.8MHz SOIC 43 mA 16 9.98 x 3.99 x 1.55mm 230MHz 1.55mm 9.98mm
RS Stock No. 807-1776
Mfr. Part No.ADF4151BCPZ
SGD9.25
Each
units
- - - 750MHz Surface Mount 1 - LFCSP 50 mA 32 5.1 x 5.1 x 0.75mm 3.5GHz 0.75mm 5.1mm
RS Stock No. 796-0101
Mfr. Part No.Si5326C-C-GM
SGD43.15
Each
units
- - - 346MHz Surface Mount 4 2kHz QFN 279 mA 36 6 x 6 x 0.85mm 710MHz 0.85mm 6mm
RS Stock No. 523-7162
Mfr. Part No.ADF4001BRUZ
SGD6.82
Each
units
- - - - Surface Mount 1 - CP 20 5.5 mA 16 5 x 4.4 x 1.05mm 200MHz 1.05mm 5mm
RS Stock No. 709-6011
Mfr. Part No.AD5930YRUZ
SGD22.75
Each
units
- - - - Surface Mount - - TSSOP - 20 6.5 x 7.6 x 1.05mm - 1.05mm 6.5mm